Frequencies for first 10,000 rows of ume_repec variable in natlterr2005 dataset :

     Repeat |
  C-Section |
        U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        530        5.30        5.30
          2 |      3,984       39.84       45.14
          9 |      1,741       17.41       62.55
          . |      3,745       37.45      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Dec 2015